Question

Сколько пальцев на ногах птиц? Как они расположены? чем покрыта цевка?

Answer 1

У птиц 4 пальца на ногах, 3 направлены вперед, и 1 назад, если дятел сидит на стволе дерева, то 2 направлены вперед -вверх и 2 назад - вниз, у страуса эму -всего два пальца. Цевка покрыта роговыми чешуйками.

Answer 2

Number of Toes on Bird's Feet

Birds typically have four toes on each foot, with three toes pointing forward and one toe pointing backward. This arrangement is known as anisodactyl, which means "unequal toes".

Arrangement of Toes

The arrangement of the toes on a bird's foot is as follows: - Three toes pointing forward: These toes are called the anterior toes and are used for perching, walking, and gripping branches. - One toe pointing backward: This toe is called the hallux and is positioned at the back of the foot. It provides stability and balance while perching.

Covering of the Beak

The beak of a bird is covered with a tough, keratinized layer called the rhamphotheca. The rhamphotheca is made up of layers of keratin, the same material found in our hair and nails. It protects the underlying structures of the beak and varies in shape and size depending on the species of bird.

I hope this information helps! Let me know if you have any more questions.